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Shroud assembly

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Publication number
US20070277752A1
US20070277752A1 US11446655 US44665506A US2007277752A1 US 20070277752 A1 US20070277752 A1 US 20070277752A1 US 11446655 US11446655 US 11446655 US 44665506 A US44665506 A US 44665506A US 2007277752 A1 US2007277752 A1 US 2007277752A1
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US
Grant status
Application
Patent type
Prior art keywords
shroud
fan
member
inner
outer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US11446655
Inventor
Eric Brian Smith
Jeremy Van Essen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deere and Co
Original Assignee
Deere and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/08Sealings
    • F04D29/083Sealings especially adapted for elastic fluid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/10Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00Pumping cooling-air or liquid coolants
    • F01P5/02Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/06Guiding or ducting air to, or from, ducted fans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/60Mounting; Assembling; Disassembling
    • F04D29/64Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646Mounting or removal of fans

Abstract

A vehicle has an engine movably mounted on a frame, a fan mounted on an engine driven shaft, a radiator fixedly mounted on the frame, and a hollow shroud assembly which extends from the fan to the radiator. The shroud assembly includes an inner shroud member, an outer shroud member and a flexible annular seal member which interconnects the inner and outer shrouds. The inner shroud member is mounted to the engine and fixed with respect to the engine and the fan. The inner shroud member integrally forms an aspirator port. The outer shroud member is fixed with respect to the frame. The flexible seal member sealingly engages the inner and outer shroud members. The seal member has an annular gripping part and an annular lip which projects away from the gripping part. The gripping part grippingly engages an end of the outer shroud member. The lip engages an outer surface of the inner shroud member. The gripping part has a U-shaped cross section and an annular frame with a U-shaped cross section is embedded in the gripping part.

Description

    BACKGROUND
  • [0001]
    The present invention relates to a fan shroud assembly for a vehicle.
  • [0002]
    Commercially available tractors typically include a cooling fan and a fan shroud which at least partially surrounds the fan. The fan is mounted to the engine on an engine driven shaft, and the shroud is normally mounted to the vehicle frame. A certain fan tip to shroud clearance must be maintained for optimum cooling system performance, and to reduce drive-by noise. Some fan shrouds have a pre-cleaner aspirator connection for producing a vacuum which operates a pre-cleaner aspirator. The amount of vacuum will vary if the distance between the pre-cleaner aspirator connection and the fan blade varies—the vacuum will vary if the fan blade is allowed to move or oscillate with respect to the aspirator connection location.
  • [0003]
    Typically, tractor engines have been rigidly mounted as an integral part of the vehicle frame. However, a rigid engine mount transmits engine noise and vibration into the operator's station or cab. To minimize noise transmission, the engine has been mounted to the tractor frame using elastomer vibration isolators which allow the engine to move relative to the vehicle frame. Since the cooling fan is attached to the engine and the surrounding fan shroud is attached to the frame, any motion or torque of the engine effects the fan tip to shroud clearance and effects the operation of the aspirator connection. It is desired to have a shroud assembly which maintains a fixed fan blade to shroud positional relationship despite movement of the engine relative to the vehicle frame.
  • [0004]
    By mounting the fan 0.75 diameters away from the radiator, air flow distribution across the radiator is even, though the radiator is rectangular and the fan is circular. Systems where the fan-to-radiator clearance is less than 0.1 fan diameter fail to utilize the corners of the rectangular radiator.
  • [0005]
    A two-piece fan shroud is used on a production mount log loader. This shroud assembly has shroud part which surrounds an engine driven fan and which is bolted to the engine. However, this shroud assembly lacks an aspiration port. A seal is installed between the other shroud part and a radiator. But, this seal is designed to withstand a positive internal pressure, and would not be suited to the negative pressure which exits in a tractor fan shroud.
  • SUMMARY
  • [0006]
    Accordingly, an object of this invention is to provide a shroud assembly for a vehicle which has an engine which is mounted for movement relative to the vehicle frame.
  • [0007]
    A further object of the invention is to provide such a shroud assembly which maintains a fixed distance between an aspirator port and the fan blades.
  • [0008]
    A further object of the invention is to provide such a shroud assembly which minimizes variation in the vacuum efficiency of an aspirator port.
  • [0009]
    A further object of the invention is to provide such a shroud assembly wherein the aspirator port is formed as an integral part of the shroud assembly.
  • [0010]
    A further object is to provide such a shroud assembly with an elastomer seal between the inner and outer shrouds for flexibility and sealing ability.
  • [0011]
    These and other objects are achieved by the present invention, wherein a vehicle includes an engine which is movably mounted on a frame. A fan is mounted on an engine driven shaft, and a radiator fixedly mounted on the frame. A fan shroud assembly partially surrounds the fan and extends from the fan to the radiator. The shroud assembly includes an inner shroud member, an outer shroud member and a flexible annular seal member which interconnects the inner and outer shrouds. The inner shroud member is mounted to the engine and fixed with respect to the engine and the fan. The inner shroud member integrally forms an aspirator port. The outer shroud member is fixed with respect to the frame. The flexible seal member sealingly engages the inner and outer shroud members. The seal member has an annular gripping part and an annular lip which projects away from the gripping part. The gripping part grippingly engages an end of the outer shroud member. The lip engages an outer surface of the inner shroud member. The gripping part has a U-shaped cross section and an annular frame with a U-shaped cross section is embedded in the gripping part.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0012]
    FIG. 1 is a side view of a shroud assembly of the present invention with schematic representation of the engine and frame;
  • [0013]
    FIG. 2 is an enlarged sectional view of a portion of FIG. 1;
  • [0014]
    FIG. 3 is a perspective view of the fan and the inner shroud of the shroud assembly of FIG. 1;
  • [0015]
    FIG. 4 is a sectional side view taken along lines 44 of FIG. 3; and
  • [0016]
    FIG. 5 is an exploded perspective view of the shroud assembly of FIG. 1.
  • DETAILED DESCRIPTION
  • [0017]
    Referring to FIG. 1, a vehicle such as an agricultural tractor, includes an engine 10 mounted on a frame member 12 with flexible vibration isolators 14. A radiator 16 is rigidly supported on the frame member 12. A fan 18 with a plurality of blades 19 is mounted on an engine driven shaft 20. A hollow shroud assembly 22 partially surrounds the fan 18 and extends between the fan and the radiator 16.
  • [0018]
    The shroud assembly 22 includes an inner shroud 24 and an outer shroud or plenum 26 which are joined together by an annular seal member 28. The inner shroud 24 includes a cylindrical wall 23 and an annular central stiffening flange 25 which projects radially outwardly from wall 23. Brackets 27 rigidly support radiator 16 on frame member 12. The outer shroud 26 is secured to the radiator 16 with bolts or capscrews (not shown). The inner shroud 24 is rigidly fixed to the engine 10 by a pair of brackets 30, one of which is seen in FIG. 1. The brackets 30 are bolted to attachment members 31 which are integrally formed near the bottom portion of inner shroud 24. As a result, the space or clearance between the blades 19 of the fan 18 and the inner surface of inner shroud 24 remains fixed, since the engine 10, fan 18 and inner shroud 24 all move together when the engine 10 vibrates with respect to the frame member 12. In addition to the lower brackets or engine mounts 30, upper brackets 33 to support the inner shroud 24 with respect to the engine 10.
  • [0019]
    As best seen in FIG. 2, the flexible seal member 28 has an annular gripping part 32 and an annular lip 34 which projects axially away from a radially outer portion of the gripping part 32. The gripping part 32 has a U-shaped cross sectional shape formed by an inner wall or rim 36, outer wall or rim 38 and bight portion 40. A rigid frame member 42 with a U-shaped cross section is embedded in the gripping part 32. The frame member 42 is rigid, but is flexible enough to create a spring force so that it grips the outer shroud 26.
  • [0020]
    Wall 36 has an annular sealing flap 44 on its inner surface, and wall 38 has an annular sealing flaps 46 on its inner surface. The gripping part 32 receives the forward end of the outer shroud 26 so that the flaps 44 and 46 make contact with the surfaces of the outer shroud 26. The flexible annular lip 34 sealingly engages an outer surface of the inner shroud 24. The suction produced by the fan 18 helps cause the lip 34 of the seal member 28 to stay in sealing contact with inner shroud 24, and thus seal member 28 maintains a substantially airtight seal between the inner shroud 24 and the outer shroud 26 despite relative movement therebetween. The annular flaps 44 and 48 do not seal, but supply gripping surfaces to restrain the seal 34 to the shroud 26.
  • [0021]
    The seal is preferably approximately 44 millimeters wide and is held in place without any special fasteners or adhesives due to the U-shaped rigid frame embedded in the sealing member 28. As fan speed increases, so does the sealing effect of the sealing member 28, which is necessary due to the torque of the engine 10 causing misalignment between the inner shroud 24 and the outer shroud 26.
  • [0022]
    As best seen in FIGS. 3 and 4, an aerodynamic port structure 50 is integrally formed in the inner shroud 24 close to the area occupied by the blades 19 of the fan 18. An opening or port 52 extends through the port structure 50. The operation of the fan 18 will draw air in through the port 52. Port 52 may be connected by an air hose (not shown) to a device which requires aspiration, such as an engine air pre-cleaner (not shown). Because the space or clearance between the fan blades 19 and the inner shroud 24 remains fixed, there will be a fixed clearance between the port structure 50 and the fan blades 19, and there will be a constant amount of vacuum produced at port 52 at fixed fan speeds. This minimizes variation in the vacuum efficiency of the device being aspirated by port 52.
  • [0023]
    As best seen in FIG. 5, the sealing member 28 has a two-piece construction with two halves 60 and 62, and the outer shroud 26 has a two-piece construction with two halves 64 and 66.
  • [0024]
    While the present invention has been described in conjunction with a specific embodiment, it is understood that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, this invention is intended to embrace all such alternatives, modifications and variations which fall within the spirit and scope of the appended claims.
  • Assignment
  • [0025]
    The entire right, title and interest in and to this application and all subject matter disclosed and/or claimed therein, including any and all divisions, continuations, reissues, etc., thereof are, effective as of the date of execution of this application, assigned, transferred, sold and set over by the applicant(s) named herein to Deere & Company, a Delaware corporation having offices at Moline, Ill. 61265, U.S.A., together with all rights to file, and to claim priorities in connection with, corresponding patent applications in any and all foreign countries in the name of Deere & Company or otherwise.

Claims (11)

1. A fan shroud assembly for a vehicle having a frame, an engine movably mounted on the frame, a fan mounted on an engine driven shaft, and a radiator fixedly mounted on the frame, the fan shroud assembly comprising:
an inner shroud member mounted to the engine and fixed with respect to the engine and the fan, the inner shroud member at least partially surrounding the fan and having an aspirator port exposed to negative pressure produced by operation of the fan;
an outer shroud member fixed with respect to the frame; and
an elastomer annular seal member sealingly engaging the inner and outer shroud members, the fan shroud assembly extending from the fan to the radiator.
2. The fan shroud assembly of claim 1, wherein:
the seal member has a first annular part with a U-shaped cross section and a second annular part which projects generally axially away from the first part, the first part having a rigid annular frame with a U-shaped cross section embedded therein.
3. The fan shroud assembly of claim 2, wherein:
the first part of the seal member comprises radially inner and outer annular rims, and the second part of the seal member comprises an annular lip which projects generally axially away from the rims, an end of one of the shroud members being received between the inner and outer annular rims, and the lip engaging a surface of the other of the shroud members.
4. The fan shroud assembly of claim 1, wherein:
the seal member has radially inner and outer annular rims and an annular lip which projects generally axially away from the rims, an end of one of the shroud members being received between the inner and outer annular rims, and the lip engaging a surface of the other of the shroud members.
5. The fan shroud assembly of claim 1, wherein:
the seal member has radially inner and outer annular rims and an annular lip which projects generally axially away from the rims, an end of the outer shroud member being received between the inner and outer annular rims, and the lip engaging a surface of the inner shroud member.
6. The fan shroud assembly of claim 1, wherein:
the seal member has an annular gripping part and an annular lip which projects away from the gripping part, the gripping part grippingly engaging an end of one of the shroud members, and the lip engaging an outer surface of the other of the shroud members.
7. The fan shroud assembly of claim 6, wherein:
the gripping part has a U-shaped cross section and an annular frame with a U-shaped cross section is embedded in the gripping part.
8. The fan shroud assembly of claim 6, wherein:
the gripping part receives an end of the outer shroud member; and
the lip engages an outer surface of the inner shroud member.
9. A fan shroud assembly for a vehicle having a frame, an engine movably mounted on the frame, a fan mounted on an engine driven shaft, a radiator fixedly mounted on the frame, the fan shroud assembly comprising;
an inner shroud member mounted to the engine and fixed with respect to the engine and the fan, the inner shroud member at least partially surrounding the fan and having an aspirator port adjacent blades of the fan;
an outer shroud member fixed with respect to the frame; and
a flexible annular seal member sealingly engaging the inner and outer shroud members, the seal member having an annular gripping part and an annular lip which projects away from the gripping part, the gripping part grippingly engaging an end of the outer shroud member, the lip engaging an outer surface of the inner shroud member, and the fan shroud assembly extending from the fan to the radiator.
10. A fan shroud assembly for a vehicle having a frame, an engine movably mounted on the frame, a fan mounted on an engine driven shaft, and a radiator fixedly mounted on the frame, the fan shroud assembly comprising:
an inner shroud member mounted to the engine and fixed with respect to the engine and the fan, the inner shroud member at least partially surrounding the fan and having an aspirator port exposed to negative pressure produced by operation of the fan;
an outer shroud member fixed with respect to the frame and the radiator; and
a flexible annular seal member sealingly engaging the inner and outer shroud members, the fan shroud assembly extending from the fan to the radiator, the seal member having an annular gripping part with a U-shaped cross section which receives an end of one of the inner ad outer shroud members, and the seal member having an annular lip which projects away from gripping part and which engages an outer surface of the other of the inner and outer shroud members.
11. The fan shroud assembly of claim 10, wherein:
an annular frame with a U-shaped cross section is embedded within the gripping part.
US11446655 2006-06-05 2006-06-05 Shroud assembly Granted US20070277752A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11446655 US20070277752A1 (en) 2006-06-05 2006-06-05 Shroud assembly

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11446655 US20070277752A1 (en) 2006-06-05 2006-06-05 Shroud assembly
CN 200710108869 CN101085597A (en) 2006-06-05 2007-06-05 Fan shroud assembly
EP20070109608 EP1865207A3 (en) 2006-06-05 2007-06-05 Fan shroud assembly

Publications (1)

Publication Number Publication Date
US20070277752A1 true true US20070277752A1 (en) 2007-12-06

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Family Applications (1)

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US11446655 Granted US20070277752A1 (en) 2006-06-05 2006-06-05 Shroud assembly

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CN (1) CN101085597A (en)
EP (1) EP1865207A3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070062468A1 (en) * 2004-08-30 2007-03-22 International Truck Intellectual Property Company, Llc Engine cooling fan shroud
US20100229810A1 (en) * 2009-03-10 2010-09-16 Uwe Blass Cooling apparatus for a motor vehicle
US8408344B2 (en) 2010-09-01 2013-04-02 Toyota Motor Engineering & Manufacturing North America, Inc. Sealing members for radiator assemblies and radiator assemblies comprising the same
US20150226130A1 (en) * 2012-09-26 2015-08-13 United Technologies Corporation Gas turbine engine including vane structure and seal to control fluid leakage
US20160214460A1 (en) * 2015-01-22 2016-07-28 Ford Global Technologies. Llc Active seal arrangement for use with vehicle condensers

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8230957B2 (en) 2008-01-30 2012-07-31 Deere & Company Flow-inducing baffle for engine compartment ventilation
FR2947591B1 (en) * 2009-07-02 2011-07-22 Valeo Systemes Thermiques Together form a motor support and a reception ring thereof
CN103884221A (en) * 2012-12-21 2014-06-25 德昌电机(深圳)有限公司 Heat exchanger and fan equipment thereof
DE102015206549A1 (en) * 2015-04-13 2016-10-13 Mahle International Gmbh Motor vehicle with a cooler arrangement

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232081A (en) * 1974-04-24 1980-11-04 Schlegel (U.K.) Limited Edge protector trim strip
US4417636A (en) * 1981-06-22 1983-11-29 Eaton Corporation Cooling fan ducting
US4448430A (en) * 1982-01-27 1984-05-15 Draftex Development Ag Hollow reinforced sealing strips
US4522160A (en) * 1984-01-23 1985-06-11 J. I. Case Company Fan-shroud structure
US4690412A (en) * 1984-08-23 1987-09-01 Tuckley Trevor R Strip structure intended for clamping on a flange
US4999951A (en) * 1988-11-16 1991-03-19 The Standard Products Company Magnetic window seal assembly
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US6105660A (en) * 1998-11-02 2000-08-22 Textron Inc. Oil cooler movably supported on a vehicle and method for same
US6772824B1 (en) * 1999-09-03 2004-08-10 Honda Giken Kogyo Kabushiki Kaisha Cooling system for vehicle
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070062468A1 (en) * 2004-08-30 2007-03-22 International Truck Intellectual Property Company, Llc Engine cooling fan shroud
US7350485B2 (en) * 2004-08-30 2008-04-01 International Truck Intellectual Property Company, Llc Engine cooling fan shroud
US20100229810A1 (en) * 2009-03-10 2010-09-16 Uwe Blass Cooling apparatus for a motor vehicle
DE102009012025A1 (en) * 2009-03-10 2010-09-16 Behr Gmbh & Co. Kg Cooler for a motor vehicle
US8573931B2 (en) 2009-03-10 2013-11-05 Behr Gmbh & Co. Kg Cooling apparatus for a motor vehicle
US8408344B2 (en) 2010-09-01 2013-04-02 Toyota Motor Engineering & Manufacturing North America, Inc. Sealing members for radiator assemblies and radiator assemblies comprising the same
US20150226130A1 (en) * 2012-09-26 2015-08-13 United Technologies Corporation Gas turbine engine including vane structure and seal to control fluid leakage
US20160214460A1 (en) * 2015-01-22 2016-07-28 Ford Global Technologies. Llc Active seal arrangement for use with vehicle condensers

Also Published As

Publication number Publication date Type
EP1865207A2 (en) 2007-12-12 application
EP1865207A3 (en) 2014-05-14 application
CN101085597A (en) 2007-12-12 application

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Legal Events

Date Code Title Description
AS Assignment

Owner name: DEERE & COMPANY, ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SMITH, ERIC BRIAN;VAN ESSEN, JEREMY;REEL/FRAME:017944/0248

Effective date: 20060601